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How to fix iPhone 6s “Unable to join network” in iOS 11/12 [2018]

iPhone
6, 6s and iPhone 7 users after upgrading their iPhone to iOS 11 are unable to
connect to WIFI networks from iPhone and while trying to connect iPhone is giving
error pop up saying “unable to join
network”. This error happens when you’re
trying to join a network and it can be really frustrating. It seems to happen
with iPhone only as the other iPad, android phones are connecting fine to same WIFI
network without giving any issue. The issue seems occur more frequently with
iOS 11 than iOS 10.

iphone unable to join network

Sometimes
even with the iPad issue seems to occur and iPad gives error message “Unable to
join network”. The error message is not very clear that why iPhone is not able
to connect to a WIFI network. But if this message occurs the user is unable to
join the WIFI network.

Why iPhone and iPad getting “‘Unable to
Join the Network”? :

The major
issue for iPhone WIFI connection issue could be due to a

1.very weak signal

2.software glitch in iPhone

3.Software glitch in router

4.Hardware fault

But as
per the error message it seems that the issue is due to software bug or weak
signal. To eliminate poor signal strength please take your iPhone near to router
and test by joining the network. If you are still unable to join the wifi
network please read the following possible fixes for the issue:

How to fix WIFI issue on iPhone “Unable to
join network”

Fix 1:Test with updating Router settings

To fix
the error message “unable to join network” Change the router settings eg to
choose channel “6” instead of “Auto” or e B+G instead of B+G+N. (depending upon
router model)Also change the security
to WPA2 from WPA. This should fix iPhone not able to join the wireless network
issue. You can also try to change the frequency of router (GHz) from the option
available in Router settings.

The seems
to occur with specific Wireless Network routers, so if your router support dual
band routing try to test connection with other network as well.

iphone unable to join network

Fix 3:
Hard Reset iPhone and Reset Network Settings.

Network connectivity issue can be solved by Resetting
Network Settings: Settings > General > Reset > Reset Network Settings.
It’ll require you to put your password. And this operation will disconnect all
Wi-Fi networks and erase passwords you’ve entered. Now set up again to connect
to Wireless network. Moreover you should hard reset your iPhone to fix any
minor software glitches in iPhone.

Fix 3:
Restart Router

Restart Router: just power off your router and power on it
again. Let it be disconnected from power for more than 15 minutes. And once done Restart iPhone, now try again to
connect to WiFi. IPhone should be able to connect to wifi network.

Further it is always recommended to upgrade the iPhone to
latest iOS 11/ iOS 12. WIFI issues and similar network issues may be fixed by
Apple in upcoming fixes/releases.